Year	Percent of GDP
2004-01-01	15.0221
2005-01-01	18.5911
2006-01-01	20.9228
2007-01-01	26.6033
2008-01-01	27.4024
2009-01-01	27.4863
2010-01-01	25.6866
2011-01-01	25.1071
2012-01-01	28.8798
2013-01-01	31.1902
2014-01-01	30.1105
2015-01-01	27.7555
2016-01-01	27.1989
2017-01-01	28.3813